JPS62233344A - Preventer for leakage of water in outer wall of underground structure - Google Patents

Abstract

PURPOSE:To completely prevent the leakage of water by a method in which a PC steel plate is set on the outside of a water-proof layer provided on the outside of a room in the outer wall of an underground structure, a plurality of vertical holes leading to a water-collecting pipe are formed in the PC plate, and many small holes are formed in the sides of the vertical holes. CONSTITUTION:A PC plate 3 is set on the outside of a water-proof layer 2 formed on the outside of a room in the outer wall 1 of a basement and supported by a foundation 4 on the lower end of the outer wall 1. A plurality of vertical holes having many horizontal holes in the vertical direction of their sides are provided in the plate 3 and connected to a water collection pipe 6 below the foundation 4 by a connecting pipe 7.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an underground structure O outer wall water leakage prevention device.

BACKGROUND OF THE INVENTION Generally, the outer walls of important underground structures such as nuclear power related facilities and general buildings in civil engineering and construction are treated to prevent water leakage.

Conventionally, this type of water leakage prevention treatment has involved applying an asphalt waterproof layer to the exterior surface of underground walls, or using a sub-drain system in combination with this to maintain the groundwater level below a certain level.

However, with this type of structure, the ground around the structure is generally created with backfill soil and compacted using heavy equipment to meet the seismic design conditions, and furthermore, due to long-term consolidation settlement, underground Reactions occurred between the waterproof layer of the outer wall and the backfill soil, causing problems such as the waterproof layer shifting or breaking and turning over, which was a major cause of water leakage.

This invention was proposed to solve the above-mentioned conventional problems, and it prevents the waterproof layer from shifting or breaking due to direct friction between the backfill soil and the waterproof layer, and completely prevents water leakage from underground outer walls. The purpose is to prevent

Means for Solving the Problems This invention provides a waterproof layer on the outdoor side of the outer wall of an underground structure, erects a PC board on the outside, and installs a plurality of vertical holes connected in the vertical direction on this PC board leading to water collection pipes. The above object is achieved by providing a vertical hole and a plurality of horizontal holes on the sides of the vertical hole.

EXAMPLE Below, the present invention will be explained by an example illustrated in the figure.The figure shows a part of the basement of a building, and a waterproof layer 2 made of an asphalt waterproof layer or the like is provided on the outside of the exterior wall 1 over the entire surface of the exterior wall 1. Further, a PCC 20 is installed over the entire surface of the waterproof layer 2 on the outdoor side of the waterproof layer 2. P
The lower end of the CC20 outer wall 1 is supported by a foundation 4 made of cast-in-place concrete.

In the PCC 20, a plurality of vertical holes 5 are formed continuously in the vertical direction of the PCC 20 and at regular intervals in the width direction of the PC board 30. Each vertical hole 5 is connected to a water collection pipe 6 buried under the foundation 4 by a connecting pipe 7.

Further, a plurality of horizontal holes 8, . . . are formed in the side portion of each vertical hole 5 at regular intervals in the vertical direction of the vertical hole 5.

Note that the vertical holes 5 and the horizontal holes 8° are formed in advance when the PCC 20 is molded.

In such a configuration, groundwater in the ground flows through the horizontal hole 8.
...The groundwater is guided into the vertical hole 5, and the groundwater in the vertical hole 5 is further collected into a water collection pipe 6 through a connecting pipe 7. Then, the groundwater in the water collection pipe 6 is quickly drained to the ground by a drainage pump (not shown).

As a result, there is no possibility that groundwater in the ground will infiltrate into the interior of the room through the PCC 20, and leakage of groundwater can be completely prevented.

In addition, if there is no need to drain groundwater at all, PCC
20 PCC without any vertical holes 5 or horizontal holes 8
20 shall be installed simply as a curing material for the waterproof layer 2.

Effects of the Invention The present invention has the following effects because it has the above configuration.

■ The waterproof layer formed on the outdoor side of the exterior wall of an underground structure is protected by installing a PC board in front of it, so there is no risk of shifting, breaking, or peeling of the waterproof layer due to direct friction between the waterproof layer and the surrounding ground. Furthermore, since the PC board is provided with vertical and horizontal holes for actively collecting and draining underground water, leakage of underground water can be completely prevented.

■ Also, since PC boards are used as the curing material for the waterproof layer, construction can be done extremely easily and in a short period of time.

■ Furthermore, when backfilling the surrounding ground, great care has traditionally been taken not to damage the waterproof layer, but according to this device VC, the PC board will serve as a curing material for the waterproof layer during backfilling, so the above-mentioned There is no need to worry about such things, and you can speed up and streamline the machining process.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of this invention.
FIG. 1 is a partial sectional view of the underground part of the building, FIG. 2 is an enlarged view of section A in FIG. 1, and FIG. 3 is a sectional view taken along the line B--B in FIG. 2. 1. Exterior wall, 2. Waterproof layer, 3. PCC10 foundation,
5. Vertical hole, 6. Water collection pipe 7. Connecting pipe, 8. Horizontal hole, 9. Backfill soil.

Claims (1)

[Claims] A waterproof layer is provided on the outdoor side of the outer wall of the underground structure, and a precast concrete board (hereinafter referred to as a PC board) is erected on the outside of the waterproof layer, and a plurality of vertical holes are provided in series in the vertical direction on this PC board leading to water collection pipes. A water leakage prevention device for the outer wall of an underground structure, characterized in that a plurality of small holes are provided on the side of a vertical hole.